The outermost layer of our skin has a protective film called sebum film, which protects, moisturizes, and softens the skin.
The sebum film is most afraid of high temperatures.
If you use hot water, it will destroy the sebum film and lose its protective function.
If you use cold water, your pores will contract and you won’t be able to remove the dirt from your pores.
So washing your face with warm water is best for your skin.
